How to know if a guy knows you like him?

I do give me crush a lot of hints that I like him and I feel like he knows to but at the same time I think he's playing dumb or he might really be dumb.
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+1 y
I sometimes send him dating test (for fun), I compliment him a lot, I always tell him I'm lucky to meet him, you as guy or girl wouldn't you notice that the other person likes you?
How to know if a guy knows you like him?
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